Guides5 minute read
What makes a thumbnail work on a children's video
The thumbnail is judged twice: once by a parent scrolling past, once by a child pointing at a screen. Most fail the second test.
Advice about thumbnails is mostly written for videos adults choose for themselves. A children's rhyme is different, because two people decide, and they want different things.
The adult is scanning quickly and deciding whether this looks safe and calm. The child is looking for a creature they recognise and can name. A thumbnail has to answer both in the same image.
Design at 120 pixels, not at full size
Most thumbnails are judged at roughly the width of a thumb. Whatever you make, shrink it until it is about 120 pixels wide and look at it then. Almost everything that felt clever disappears.
- One subject, filling a third to a half of the frame
- The face visible, and large enough that the eyes read as eyes
- Two or three colours, with real contrast between subject and background
- No text a small child cannot read, which means no text they need
- Nothing in the lower right, where the duration badge sits
The face rule is the one people break most. A wide establishing shot of a beautiful landscape with your mascot as a small dot is a lovely picture and a useless thumbnail.
Make it the same creature
The thumbnail should show the character exactly as it appears in the video, in the same style and palette. This matters more on a kids channel than anywhere else, for two reasons.
The first is trust: a child who taps a round blue bird and gets a different bird has been misled, and they show it by leaving. The second is recognition, which is how a channel becomes a habit rather than a series of unrelated videos.
A mascot that looks identical across every thumbnail in your catalogue does more for a small channel than any single well-composed image.
Two options, and the test between them
Make two thumbnails per video and choose deliberately. A useful pair is one close portrait and one small action scene, because they fail differently and you learn from which one holds up.
- 01
The squint test
Shrink both to thumb width and squint. Whichever still has a clear subject wins. Usually the portrait.
- 02
The name test
Show it to a child and ask what it is. If they cannot name the animal in two seconds, the picture is too busy.
- 03
The row test
Place it beside four of your own older thumbnails. It should look related to them and still be distinguishable from them.
What to leave out
No arrows, no red circles, no shocked faces, no crying, no all-caps words. These are borrowed from a different genre, they read as agitated, and an adult scanning for something calm will skip them.
Leave out numbers too, unless the video is genuinely part of a numbered series. A parent looking for a bedtime song is not comparing episode counts.
The finished thing should be almost boring to an adult: one creature, clearly lit, doing one legible thing, in colours that match the video it opens.